Female Names with Many Options

While I have always been passionate about names and have a HUGE collection of names I love, were I to name a passel of girls now, I find myself leaning toward female names with myriad nickname/alternate name options.

I like names with at least one nickname option but the more the better. However, I think I would stay with nicknames that are sort of explainable, where at least the beginning or the end matches a letter/sound combination of the actual name.
So for me Leonora can turn into Lea but Leonora cannot turn into Ena or Ennie.

I like names with at least one nickname option but the more the better. However, I think I would stay with nicknames that are sort of explainable, where at least the beginning or the end matches a letter/sound combination of the actual name.
So for me Leonora can turn into Lea but Leonora cannot turn into Ena or Ennie.

I understand what you mean about nicknames. So Coral or Delia would be "common sense" nicknames for Cordelia, but there's also the other kind of nickname, the more idiosyncratic and personal. So for example, if I named my daughter Tabitha and called her Tabby at times, I might also end up nicknaming her Kitty, because tabbies are kitties. Not with the expectation that anyone else would call her that or that she would put that on her resume or anything official.

My name is Leslie, not apparently a rich name for nicknames, but I've had about a dozen nicknames over the years, many not deeply linked to my name: Les, Lester, Leslie Lulubelle, Lulu, Lettie, Pret, Bert, and others more arcane.

I think family nicknames can always be different and since you would call your child by their names so often, they just start to develop, I think.
With your examples: I totally get Petrova and Petronella as nicknames for Petra, though because they are longer than the actual name, I would think these were family nicknames to make the name cuter.
But from the outside and not being a part of the family, I wouldn't get Polly and Pia.